Halftime report: Three takeaways as 49ers trail Browns, Manziel 10-3

Here are three takeaways from Sunday’s first half as the 49ers somehow trail only 10-3 to the host Browns:

— OFFENSIVE SNOOZE: The 49ers offense is horrible, producing only two first downs to the Browns’ 16 and only 48 yards to the Browns’ 255. It took five possessions for the 49ers to score, albeit in a three-and-out drive that ended with Phil Dawson’s 44-yard field goal 4:12 before halftime. That scoring drive was set up by Bruce Ellington’s career-long 36-yard punt return. The 49ers final offensive series should have produced points after Jaquiski Tartt’s first career interception put them at the Browns 44, but the 49ers went three-and-out in 45 seconds. Blaine Gabbert is 5-of-11 for 45 yards, and he’s been sacked five times, including on fourth-and-1 to open the second quarter.

— RUN OVER: With their offense sleeping in, the 49ers defense has been on the field far too long (for 20:25). The Browns have converted 3-of-6 third-down opportunities. The game’s only touchdown came from Isaiah Crowell, who set up his 1-yard touchdown run by racing 50 yards on the Browns’ first snap of their second possession. It was the Browns’ third rushing TD of the season and first since Oct. 11. The Browns committed two turnovers and the 49ers failed to convert either into points.

— MANZIEL THEATRICS: Johnny Manziel’s return to the Browns starting job has featured plenty of theatrics, with mixed results. He doomed them late in the half when he scrambled left and uncorked a cross-field pass that Tartt picked off at the 49ers’ 31. Manziel has otherwise made the 49ers’ pay with that move: roll out, find a wide receiver wide open for a completion. Manziel is 13-of-20 for 162 yards, and he’s gained only three yards on two scrambles. Corey Lemonier grabbed Manziel’s facemask on a third-down sack/safetyt attempt in the end zone, resulting in a penalty and automatic first down. Two snaps before that, Quinton Dial sacked Manziel for an 11-yard loss at the 4.